tax plan. >> $500 trillion tax cut to 120,000 families. >> followed by monday's use of a dollar figure never before heard in annals of economics. >> additional $1-point-trillion dollars in tax cuts. >> in between those came identity crisis involving the virginia senate candidate tim kaine. >> i am a big tom kaine fan. a big tom kaine fan. >> biden boyd has been the beneficiary of a great personality. when he commits a gaffe, often times it's just dismissed as well, it's just joe. whereas a lot of republican candidates don't get that flak. >> serious bidenologists know all biden gaffes are not equal. they distinguish between the epic hot mic moment. and those instances where it remains unclear whether he misspoke at all. >> going to put y'all back in chains. >> i think vice president very well knows that sometimes the words don't come out of your mouth the right way. >> i always say what i mean. >> defenders acknowledge the gary louse vice president is given to unscripted moments but contend the authenticity appeals to ordinary americans. in places like the vice president's native scran